Just clean and neutral. I simply used dependable resistors that I had in a range of values. I was more keen about establishing the G3X version electrically. Stability, gain, response, THD+N profile. The meat and bones stuff. Volume pot, Ck bypass cap, and Cout are arguably the more influential passive parts.
6V6 tubes themselves make a noticeable difference is my experience. Especially in the G3X where other parameters are more fixed. I could also see it in the THD and noise profiles on FFT analysis when I was exchanging brands and vintages.
6V6 tubes themselves make a noticeable difference is my experience. Especially in the G3X where other parameters are more fixed. I could also see it in the THD and noise profiles on FFT analysis when I was exchanging brands and vintages.
Yes I noted the big difference between the brown unknown brand & the Ohmite Audio Gold next will try the Mills MRA12 my favorites for more than 30 ohms values, less than 30 ohms are Mundorf M-Resist Supreme 30W.
NFB resistors have also a great impact in the SQ as anode load resistor, all counts....
NFB resistors have also a great impact in the SQ as anode load resistor, all counts....
Its a few parts only circuit so everyone who wants to try several passives of his liking is easier to do so. Some will say its trivial some will relish. I only say its a solid circuit don't change the values, just see to have enough working voltage and wattage spec.
Salas what about to use as headphone amp without NFB and in place anode load resistor a OPT 15K:600 so using 300R cans 6V6 see 7K5 is enough? or hybrid mu-follower from Ale Moglia to reduce output impedance without gain loss to drive direct the 300R cans?
But you will see if it's possible as suggested? with the same voltages & bias?
N.B. Of course if you aren't interested or it's a lot of work let it go Salas.
N.B. Of course if you aren't interested or it's a lot of work let it go Salas.
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15000:600 is 1:25 impedance and its square root is 1:5 for voltage so if put on a without feedback 6V6 line preamp you get 1:1 or below voltage gain for headphones.
There is the other possibility to use the hibryd mu-follower from Ale Moglia aka Bartola as anode load.
It's a very good reflection. Happened the same reflection using noDac: when used the step-up in place active gain transparency was absolut best but bass lost authority, added 12B4 or 6V6 more bass less transparency, added xfeed to cans less transparency but soundstage more centered & listened better the insturments. engineering are compromises.
26 DHT & 6V6 G3X are both very very transparent devices.
26 DHT & 6V6 G3X are both very very transparent devices.
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